0_0_36910917_31180.cpp:12:14: error: 'Point' was not declared in this scope
double cross(Point a,Point b,Point c) ///²æ»ý
^
0_0_36910917_31180.cpp:12:22: error: 'Point' was not declared in this scope
double cross(Point a,Point b,Point c) ///²æ»ý
^
0_0_36910917_31180.cpp:12:30: error: 'Point' was not declared in this scope
double cross(Point a,Point b,Point c) ///²æ»ý
^
0_0_36910917_31180.cpp:12:37: error: expression list treated as compound expression in initializer [-fpermissive]
double cross(Point a,Point b,Point c) ///²æ»ý
^
0_0_36910917_31180.cpp:13:1: error: expected ',' or ';' before '{' token
{
^
0_0_36910917_31180.cpp:16:1: error: 'Point' does not name a type
Point intersection(Point a,Point b,Point c,Point d)
^
0_0_36910917_31180.cpp:25:20: error: 'Point' was not declared in this scope
double PolygonArea(Point* p, int n)
^
0_0_36910917_31180.cpp:25:27: error: 'p' was not declared in this scope
double PolygonArea(Point* p, int n)
^
0_0_36910917_31180.cpp:25:30: error: expected primary-expression before 'int'
double PolygonArea(Point* p, int n)
^
0_0_36910917_31180.cpp:25:35: error: expression list treated as compound expression in initializer [-fpermissive]
double PolygonArea(Point* p, int n)
^
0_0_36910917_31180.cpp:26:1: error: expected ',' or ';' before '{' token
{
^
0_0_36910917_31180.cpp:34:13: error: 'Point' was not declared in this scope
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:20: error: 'a' was not declared in this scope
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:23: error: 'Point' was not declared in this scope
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:30: error: 'b' was not declared in this scope
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:33: error: expected primary-expression before 'int'
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:41: error: expected primary-expression before 'int'
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:34:47: error: expression list treated as compound expression in initializer [-fpermissive]
double CPIA(Point* a, Point* b, int na, int nb)//ConvexPolygonIntersectArea
^
0_0_36910917_31180.cpp:35:1: error: expected ',' or ';' before '{' token
{
^
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